Heat Pump Central Plant

The heat pump central plant represents a large scale heat pump connected to the district heating network. It supplies directly useful heat. Its COP is calculated based on a constant demand-side temperature and an inflow temperature as well as a quality factor. The inflow temperature can be the air temperature or a fixed temperature defined by the user.

Attribute	Description	Standard value	Unit	Data type
deployment	If set to ‘true’, the technology will be considered in the energy system model (this does not necessarily mean it will be used). Only relevant for optimisation.	False	—	bool
kW_th_max	Maximum thermal power output	inf	kW	str
force_cap_max		False	—	bool
cap_min_use		0	kW	float
co2_intensity	Carbon-dioxide intensity of technology output (annual average value).	0 *(emissons allocated to electricity tech)*	kg CO2/kWh	int
lifetime	Expected lifetime of technology before replacement is required.	25	years	int
capital_cost	CAPEX cost of technology per unit of capacity.	2000	CHF/kWp	float
maintenance_cost	OPEX cost of technology per unit of capacity.	10	CHF/kWp/year	int
interest_rate	Interest rate for computing levelised costs (if required).	0.025	—	float
cop_mode		temperature_based	—	str
cop_timeseries_file_path		[30. 30. 30. … 30. 30. 30.]	—	ndarray
cop_constant_value		3	—	float
spf_to_target		3.5	—	float
cop_source_temperature		air_temperature	—	str
cop_source_constant_temperature_value		5	°C	int
cop_hot_temperature		constant_temperature	—	str
cop_hot_temperature_constant_temperature_value		70	°C	int
quality_factor		0.5	—	float

The relationship between the in- and outflows is given by

\[\mathtt{v\_h\_hpcp} = \mathtt{COP} \cdot \mathtt{u\_e\_hpcp}\]

The symbols and names of the flows are

u_h_hpcp	Environmental Heat Inflow Heat pump (centralized)
u_e_hpcp	Inflow Electricity
v_h_hpcp	Outflow Heat